Unit 2 - Topic 5 - Parasitism - Section F - Challenges in Treatment and Control

Question 1

What is epidemiology

Answer 1

The study of the outbreak and spread of infectious disease

Question 2

What is the herd immunity threshold

Answer 2

The density of resistant hosts in the population required to prevent an epidemic

Question 3

What do vaccines contain

Answer 3

Antigens that will elicit and immune response

Question 4

How can similarities between hosts and parasites metabolism cause a problem

Answer 4

It difficult to find drug compounds that only target the parasite

Question 5

What must be reflected in the design of vaccines

Answer 5

Antigenic variation

Question 6

Why can designing vaccines for some parasites be difficult

Answer 6

Difficult to culture parasite in laboratory

Question 7

What can cause parasites to spread rapidly

Answer 7

Overcrowding or tropical climates

Question 8

Where can overcrowding occur

Answer 8

In refugee camps that result from war or natural disaster or rapidly growing cities in LEDCs.

Question 9

Why does overcrowding or tropical climates prevent a challenge

Answer 9

These conditions make co-ordinated treatment and control programs difficult to achieve

Question 10

What are examples of practical control strategies

Answer 10

Civil engineering projects to improve sanitation combined with co-ordinated vector control

Question 11

How does parasite control effect child mortality

Answer 11

Reduces child mortality and result in population-wide improvements in child development and intelligence, as individuals have more resources for growth and development